Method and apparatus for data transmission for coverage extension

A method of a base station, comprising:

• generating system information including a threshold set including one or more threshold values for repeated transmission of a random access (RA) preamble, information on a first random access channel (RACH) occasion (RO) group corresponding to a first repetition factor, and information on a second RO group corresponding to a second repetition factor;
• transmitting the system information;
• and
• performing an operation for receiving RA preambles repeated based on the first repetition factor in ROs belonging to the first RO group.

A terminal comprising a processor, wherein the processor causes the terminal to perform:

• receiving system information from a base station;
• identifying a threshold set including one or more threshold values from the system information;
• comparing a measurement result of a synchronization signal block (SSB) received from the base station with one threshold value of threshold set;
• determining a repetition factor based on a result of comparison between the measurement result and the one threshold value;
• and
• repeatedly transmitting a random access (RA) preamble to the base station based on the repetition factor.